* users don't have to create an google account for using the google groups. They can simply email to e.g. "docker-user+subscribe@googlegroups.com" to subscribe. * since this behavior is not mentioned on the google group website, i think its a good idea to explain this method here. Signed-off-by: toogley <toogley@mailbox.org> Upstream-commit: e3e18584b0552159324d93cb394b04594057adbc Component: engine